The longest war of the Roman imperial period is the war Marcus Aurelius waged with the northern German and Sarmatian tribes. The best-known events of these wars were the lightning and rain miracles. Divine intervention saved the Roman troops who were surrounded by the Germans and suffering from a water shortage, by means of a lightning and rain miracle. Thunderbolts struck the enemy while the rain soothed the Romans' suffering. Several pagan and Christian versions of the miracle existed already in Antiquity. Peter Kovacs examines these events and their sources in detail. The most important...